With these two i understand the plugging in part but i don’t understand the steps to get to the answer sorry

What graph correctly matches the equation y equals two negative x

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Describe what moves you could use to create the transformation of the original image shown at right